Abstract
The possibilities of differentiation between a "normal" and an "enlarged" ventricular system by means of Computerized Tomography are limited. The main problems are the definition of the Normal Population and the fact that a certain methodical error in measurement is not to be avoided. On the other hand, that differentiation is essential for the diagnosis of Ventricular Enlargement, Hydrocephalus internus and Brain Atrophy. The daily practice requires a method, which allows an accurate measurement as well as a quick and simple performance. The evaluation of the width of the lateral ventricles by means of the Ventricle-Index-Quotient (VIQ) and of the Ventricle-Waist-Quotient (VTQ) is likely to meet all these requirements. The results have been obtained from the computer-tomograms of 53 men and 69 women (n = 122), aged between 15 and 80 years. A statistically significant correlation was found between the VIQ- and VTQ-values on the one hand, and the patient's ages on the other. Consequently, whether normal values or the diagnosis of brain atrophy are in question, the patient's age has always to be considered.
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